#7 and #6: Jimmy Uso and Jey Uso
The Usos have had multiple matches on the SummerSlam Kickoff Show. In 2016, they teamed with NXT upstarts in American Alpha and The Hype Bros against The Ascension, The Vaudevillains, and Breezango in a 12-man tag team match that was a showcase of SmackDown's tag team division. The Usos would score the deciding fall in that matchup.
In 2017, the Usos challenged the New Day in a rematch for the SmackDown Tag Team Championships on the Kickoff Show. This was one of the best WWE matches of all of 2017. The Usos would be able to get the victory and become SmackDown Tag Team Champions. Their record is 2-0.
New Champs in WWE! More RIGHT HERE
#5: Natalya
Natalya has had a total of three matches at SummerSlam. At SummerSlam 2013, Natalya defeated Brie Bella (who was accompanied by her sister Nikki Bella) in a match in which Maria Menounos was in her corner.
At SummerSlam 2016, Natalya teamed with Alexa Bliss and a returning Nikki Bella (Nikki Bella took the place of a suspended Eva Marie) against Becky Lynch, Carmella, and Naomi in a six-women tag team match that showcased SmackDown's women's division.
At SummerSlam 2017, Natalya defeated Naomi to become the SmackDown Women's Championship at SummerSlam. She had defeated Charlotte Flair, Becky Lynch, Tamina, and Lana in an elimination fatal-five way match to earn this opportunity and took advantage of it with the Sharpshooter which allowed her SummerSlam record to become 3-0.